Paint



Patented J an. 1926.

. Au T D ;m+rrs OFFICE.

CORNELIUS s. name; or BEBKELEYfCALIFORfiIA, nssronoa 'ro THEPARAFFINEeon-raisins, me,

WARE. V

I0 Drawing.

To. all whomz't may concern Be it known that I, CORNELIUS "1No,. acitizen of the United States of v America, and a resident of Berkeley,in'the county ofAlameda and State of A have invented a new and usev u.Paint,-of which the following is a specification.

My invention relates to .jp'aintsfgfand espeeially to a paint iniwhicha. iirietal-ipowder' is usedas a pigment.- One of theob ects of the,invention is the provision ofljja paint particularly suitable forapplicationlover prepared roofingsor other surfaces previously treatedwith asphaltum paint or enam Another. object of. the. invention is Ithe; pi ductionof a paintwhich may-beusedon roofings having an.asphaltic coating; to; se-) 'silvery..white,gold and copper re arealwant in several arts, it is ntemplated that its chief application wi ein the field of roof paints-which are applied over thesocalled preparedroofings. 'IbflddS durability to the roofing becausethe overlappingscales or flakes of-themetallic-powders forming one of itsingredients-protect:thebitue minous coatings fromthe aetionof sunlight,oxidation and impact of rain, and it may. be applied toa new roofing orfor giving new life to an old roofing. It will befound especially usefulin conjunction with the i.m-,

provedroofing material described in my copending applicationSeriahNumber 518,281, sinceit enables anowner of a building covered inpart withmyJilnproved roofing material, and in part with. theordinaryroofing, to paint the latteranct-thus bring all to one sta-ndaril. In a similar'way it may be applied over a patched roofing formedof the ordinary materialsso that all may-be brought to one standard andthe; durability of the roof as a whole greatly increased.

California,

' exposed felt orssn 'rmcxsco, canrronnm, nconrona'rron or DELA- rum. ii. i I I Application filed November2 8 ,",1921. SerialNo. 518,242.

' My paint may also be used in the application of designs to roofingmaterials or fabrics. Iii-this use, it may be applied by means of,a-.cut type orstereotyped roll or slmilanmeans inked with the paint inthe ordinary manner and impressed against the roof material or fabric todeposit thereon a printed; designx It igay also be applied with paintgun or brush thru-a stencil. 7 Besides. roofing, the paint maybe appliedoverg asphaltic I paints or, over asphaltic enamels'such as are used inthe interior of or for the" painting of electric wiring ondiiitswhichhave coverings or-coatings containing bituminous composition. On such;work,".if in the interior, itis possible to {paint over thisfirstcoating with a second cure light colored efi'ects incl-udin whiteor i i g without the bitumen staining the superposed Another object ofthe invention is a paint. having great durability andj whichwillimpartto the surface to which it is applied a coat ofbrdinary paint ofanydesired color otherwise almost-useless prepared roof may berestoredcheaply and satisfactorily. This is done by first giving the entiresurface of theworn roof a coating of a bituminous roof coating paintwhich will saturate the .bers and build up a substantial new coating. Mypaintis then applied over the foundation coat and the resultant roofingis in a condition'of usefulnessprac tically onapar with a new piece ofroofing coated with my-paint. Up to this time, on

prepared roofings it has been possible to se- 7' cure only the darkercolors, such as black, brown, dark red or dark green. The addedattractiveness and value of the lighter col- .ors will be readily Iappreciated.

Tomake my paint irty pounds of California-asphaltum of a hardnessclassed as 1) grade, is melted in a suitable kettle and thenwithdrawn asafe distance from all exposed-lights. or fire and the contents allowedto cool sufficiently, say to 240 Fahrenheit so that violent boilingwillnot takeplace on the addition of the. next ingredient. By D gradeCalifornia asphaltuln is'meant an asphalt derived from a petroleum orasphalticbase by the process of distillation accom aniedby the use ofsteam in the still, t e asphalt to have a penetrationof-15'to2O at 77 F.and a softening-point ranging from; 135 to 150 F. bothi by themethods ofthe American Society for Testing. Materials, Standards of 1921. blownoroxidized asphalt having a penetration ranging between 12' and 20 andhaving a softening point ranging from 140 to 190 F. both by the samestandards, will give satisfactory results. Six and one quarter gallonsof"conm1ercial benzole is now added a little at a time with constantstirring until the entire quantity is incorporated. The mixture will nowhave cooled to such a point that evaporation will practically cease.When cold, thirty pounds of finely flaked metallic particles known asbronzing powder, is added and stirred until the mass is thoroughlycommingled.-

If aluminum bronzing powder is used the paint will produce a white orsilvery white effect. The copper bronze and the gold bronze will eachproduce their characteristic colors in the paint.

By benzole it is understood that I mean a solvent which consists of morethan 90% by volume of the chemical compound C H Benzole has been foundto have the property of causing the metallic particles of the bronzingpowder to float to the surface of paint mixtures made as abovedescribed. Other solvents have this property, including carbonbisulphide, chloroform and carbon tetrachloride, all of which aresolvents for the D grade asphaltum. In fact my experiments tend to showthat any good solvent for this asphaltum possesses the property ofmaking the metallic particles float in the paint mixture. This propertyis of high importance in my invention since when the paint is applied,the metallic particles immediately floating to the surface form acoating of overlapping flakes or scales which is of chief importance insecuring the durability characterizing my paint.

Instead of benzole, mixtures containing a considerable amount of benzolemaybe used.

This offers advantages in performing the process of making the paint.For instance, two gallons of'coal oil or turpentine substitute, both of:which have higher boiling points than benzole, may be added to the hotasphaltum first, and after the hot mixture has thus been cooled 4%gallons of benzole maybe added. Thus smaller evaporation losses ofbenzole are experienced. Grades of benzole containing lower percentagesof (3 1-1 may be used, but cannot be mixed with coal oil or turpentinesubstitute to such a degreeas the purer material.

Carbon bisulphide makes a satisfactory solvent, also a mixture, half andhalf, of carbon bisulphide and ethyl acetone. In these cases it isdesirable to dissolve the asphaltum in the solvent when cold. This maybe accomplished by breaking the asphaltum into small lumps, and placingit in the solvent in a closed vessel, mechanically stirring untilcomplete solution has been achieved.

Gasoline and benzine may also be used immediately before use. in theordinary manwith benzole in the proportion of about one third gasolineor benzine to two thirds benzole. As a matter of economy however Iprefer a solvent consisting of benzole, or of benzole mixed with benzineor turpentine substitute or gasoline in the proportions stated.

It is to be noted that benzine, coal oil, gasoline and similar petroleumproducts are not good solvents of D grade California asphaltum sincethey dissolve merely the petrolene and not the asphaltenes which arecontained in the asphaltum. So also it is found that acetone will causethe metallic particles to float, but it is not a solvent for asphaltumalthough it will dissolve certain of the bituminous tars and pitches.

Instead of asphaltum, similar bituminous materials may be employed.Stearine pitch of a similar degree of hardness gives good results. Rosinmay be used but is not consideredequal to asphaltum or stearine pitchwhich are normally used in roof coatings. Pine pitch may also be used.

It will thus be seen that there is a considerable latitude in the choiceof materials which may be employed in making the paint, with theexception of the metallic powders, which my present ca erlments show arelimited to those pow ers known commercially as bronzing powders,including the aluminum bronze, copper bronze and gold bronze.

It has been found that the metallic particles will not floatindefinitely in the paint.

Consequently if the paint is not to be usedimmediately after it is madeit is desirable to delay mixing the bronze The'paint is applied nor witha brush and upon drying, that is to say, upon evaporation of the solventand the hardening of the vehicle or asphaltum, the finely flakedmetallic particles are found to form a surface coating firmly held andsuperposed .on the vehicle or foundation coating of asphaltum.

I claim:

1. A paint comprising asphaltum and finely flaked metallic particles.

2. A paint comprising asphaltum and a bronzing powder.

3. A paint comprising asphaltum, a volatile solvent for the asphaltumand a bronzing powder.

4. A paint comprising asphaltum, finely powder until flaked metallicparticles and a solvent for-- the asphaltum having the characteristic offloating the metallic particles.

5. A paint comprising asphaltum, bronzing powder, and a solvent for theasphaltum having the characteristic "of floating the particles ofbronzing powder.

6. A paint comprising a vehicle which forms the foundation coating whenthe paint is dry, a finely flaked metal whichforms a 10. The method ofmaking paint which surface coating on the dried vehicle and a comprisesdissolving D rade asphaltum volatile solvent for the vehicle having thein a volatile solvent and adding a bronzing 2 property of floating theflakes of metal in powder.

the solution of vehicle and solvent. 11. A paint comprising D gradeasphal- 7. A paint comprising asphaltum, benzole tum, a volatilesolvent; for the asphaltum, and bronzing powder. and a bron zing powder.

8. A paint comprising asphaltum, benzole 12. A paint comprising abituminous ve- 25 and bronzing powder in the proportions of hicle ofsubstantially dark color, and a 30 pounds each of asphaltum and bronzingbronzing powder. powder, and 6 4 gallons of benzole. 13. A paintcomprising a bituminous ve- 9. The method of making paint which hicleofsubstantially dark color, a volatile comprises melting D gradeasphaltum, solvent for the vehicle, and finelyflaked 30 allowing theasphaltum to cool to about 240 metallic particles.

Fahrenheit, stirring in slowly commercial In testimony whereof, I havehereunto set benzole, and when the solution is cool st1rmy hand.

ring in a bronzing powder. CORNELIUS S. FLEMING.

